1 files changed, 300 insertions, 0 deletions
diff --git a/net/sunrpc/auth_gss/gss_spkm3_mech.c b/net/sunrpc/auth_gss/gss_spkm3_mech.c
new file mode 100644
index 000000000000..dad05994c3eb
--- /dev/null
+++ b/net/sunrpc/auth_gss/gss_spkm3_mech.c
@@ -0,0 +1,300 @@
+/*
+ *  linux/net/sunrpc/gss_spkm3_mech.c
+ *
+ *  Copyright (c) 2003 The Regents of the University of Michigan.
+ *  All rights reserved.
+ *
+ *  Andy Adamson <andros@umich.edu>
+ *  J. Bruce Fields <bfields@umich.edu>
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *  3. Neither the name of the University nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/sunrpc/auth.h>
+#include <linux/in.h>
+#include <linux/sunrpc/svcauth_gss.h>
+#include <linux/sunrpc/gss_spkm3.h>
+#include <linux/sunrpc/xdr.h>
+#include <linux/crypto.h>
+
+#ifdef RPC_DEBUG
+# define RPCDBG_FACILITY	RPCDBG_AUTH
+#endif
+
+static const void *
+simple_get_bytes(const void *p, const void *end, void *res, int len)
+{
+	const void *q = (const void *)((const char *)p + len);
+	if (unlikely(q > end || q < p))
+		return ERR_PTR(-EFAULT);
+	memcpy(res, p, len);
+	return q;
+}
+
+static const void *
+simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res)
+{
+	const void *q;
+	unsigned int len;
+	p = simple_get_bytes(p, end, &len, sizeof(len));
+	if (IS_ERR(p))
+		return p;
+	res->len = len;
+	if (len == 0) {
+		res->data = NULL;
+		return p;
+	}
+	q = (const void *)((const char *)p + len);
+	if (unlikely(q > end || q < p))
+		return ERR_PTR(-EFAULT);
+	res->data = kmalloc(len, GFP_KERNEL);
+	if (unlikely(res->data == NULL))
+		return ERR_PTR(-ENOMEM);
+	memcpy(res->data, p, len);
+	return q;
+}
+
+static inline const void *
+get_key(const void *p, const void *end, struct crypto_tfm **res, int *resalg)
+{
+	struct xdr_netobj	key = { 0 };
+	int			alg_mode,setkey = 0;
+	char			*alg_name;
+
+	p = simple_get_bytes(p, end, resalg, sizeof(*resalg));
+	if (IS_ERR(p))
+		goto out_err;
+	p = simple_get_netobj(p, end, &key);
+	if (IS_ERR(p))
+		goto out_err;
+
+	switch (*resalg) {
+		case NID_des_cbc:
+			alg_name = "des";
+			alg_mode = CRYPTO_TFM_MODE_CBC;
+			setkey = 1;
+			break;
+		case NID_md5:
+			if (key.len == 0) {
+				dprintk("RPC: SPKM3 get_key: NID_md5 zero Key length\n");
+			}
+			alg_name = "md5";
+			alg_mode = 0;
+			setkey = 0;
+			break;
+		default:
+			dprintk("RPC: SPKM3 get_key: unsupported algorithm %d", *resalg);
+			goto out_err_free_key;
+	}
+	if (!(*res = crypto_alloc_tfm(alg_name, alg_mode)))
+		goto out_err_free_key;
+	if (setkey) {
+		if (crypto_cipher_setkey(*res, key.data, key.len))
+			goto out_err_free_tfm;
+	}
+
+	if(key.len > 0)
+		kfree(key.data);
+	return p;
+
+out_err_free_tfm:
+	crypto_free_tfm(*res);
+out_err_free_key:
+	if(key.len > 0)
+		kfree(key.data);
+	p = ERR_PTR(-EINVAL);
+out_err:
+	return p;
+}
+
+static int
+gss_import_sec_context_spkm3(const void *p, size_t len,
+				struct gss_ctx *ctx_id)
+{
+	const void *end = (const void *)((const char *)p + len);
+	struct	spkm3_ctx *ctx;
+
+	if (!(ctx = kmalloc(sizeof(*ctx), GFP_KERNEL)))
+		goto out_err;
+	memset(ctx, 0, sizeof(*ctx));
+
+	p = simple_get_netobj(p, end, &ctx->ctx_id);
+	if (IS_ERR(p))
+		goto out_err_free_ctx;
+
+	p = simple_get_bytes(p, end, &ctx->qop, sizeof(ctx->qop));
+	if (IS_ERR(p))
+		goto out_err_free_ctx_id;
+
+	p = simple_get_netobj(p, end, &ctx->mech_used);
+	if (IS_ERR(p))
+		goto out_err_free_mech;
+
+	p = simple_get_bytes(p, end, &ctx->ret_flags, sizeof(ctx->ret_flags));
+	if (IS_ERR(p))
+		goto out_err_free_mech;
+
+	p = simple_get_bytes(p, end, &ctx->req_flags, sizeof(ctx->req_flags));
+	if (IS_ERR(p))
+		goto out_err_free_mech;
+
+	p = simple_get_netobj(p, end, &ctx->share_key);
+	if (IS_ERR(p))
+		goto out_err_free_s_key;
+
+	p = get_key(p, end, &ctx->derived_conf_key, &ctx->conf_alg);
+	if (IS_ERR(p))
+		goto out_err_free_s_key;
+
+	p = get_key(p, end, &ctx->derived_integ_key, &ctx->intg_alg);
+	if (IS_ERR(p))
+		goto out_err_free_key1;
+
+	p = simple_get_bytes(p, end, &ctx->keyestb_alg, sizeof(ctx->keyestb_alg));
+	if (IS_ERR(p))
+		goto out_err_free_key2;
+
+	p = simple_get_bytes(p, end, &ctx->owf_alg, sizeof(ctx->owf_alg));
+	if (IS_ERR(p))
+		goto out_err_free_key2;
+
+	if (p != end)
+		goto out_err_free_key2;
+
+	ctx_id->internal_ctx_id = ctx;
+
+	dprintk("Succesfully imported new spkm context.\n");
+	return 0;
+
+out_err_free_key2:
+	crypto_free_tfm(ctx->derived_integ_key);
+out_err_free_key1:
+	crypto_free_tfm(ctx->derived_conf_key);
+out_err_free_s_key:
+	kfree(ctx->share_key.data);
+out_err_free_mech:
+	kfree(ctx->mech_used.data);
+out_err_free_ctx_id:
+	kfree(ctx->ctx_id.data);
+out_err_free_ctx:
+	kfree(ctx);
+out_err:
+	return PTR_ERR(p);
+}
+
+static void
+gss_delete_sec_context_spkm3(void *internal_ctx) {
+	struct spkm3_ctx *sctx = internal_ctx;
+
+	if(sctx->derived_integ_key)
+		crypto_free_tfm(sctx->derived_integ_key);
+	if(sctx->derived_conf_key)
+		crypto_free_tfm(sctx->derived_conf_key);
+	if(sctx->share_key.data)
+		kfree(sctx->share_key.data);
+	if(sctx->mech_used.data)
+		kfree(sctx->mech_used.data);
+	kfree(sctx);
+}
+
+static u32
+gss_verify_mic_spkm3(struct gss_ctx		*ctx,
+			struct xdr_buf		*signbuf,
+			struct xdr_netobj	*checksum,
+			u32		*qstate) {
+	u32 maj_stat = 0;
+	int qop_state = 0;
+	struct spkm3_ctx *sctx = ctx->internal_ctx_id;
+
+	dprintk("RPC: gss_verify_mic_spkm3 calling spkm3_read_token\n");
+	maj_stat = spkm3_read_token(sctx, checksum, signbuf, &qop_state,
+				   SPKM_MIC_TOK);
+
+	if (!maj_stat && qop_state)
+	    *qstate = qop_state;
+
+	dprintk("RPC: gss_verify_mic_spkm3 returning %d\n", maj_stat);
+	return maj_stat;
+}
+
+static u32
+gss_get_mic_spkm3(struct gss_ctx	*ctx,
+		     u32		qop,
+		     struct xdr_buf	*message_buffer,
+		     struct xdr_netobj	*message_token) {
+	u32 err = 0;
+	struct spkm3_ctx *sctx = ctx->internal_ctx_id;
+
+	dprintk("RPC: gss_get_mic_spkm3\n");
+
+	err = spkm3_make_token(sctx, qop, message_buffer,
+			      message_token, SPKM_MIC_TOK);
+	return err;
+}
+
+static struct gss_api_ops gss_spkm3_ops = {
+	.gss_import_sec_context	= gss_import_sec_context_spkm3,
+	.gss_get_mic		= gss_get_mic_spkm3,
+	.gss_verify_mic		= gss_verify_mic_spkm3,
+	.gss_delete_sec_context	= gss_delete_sec_context_spkm3,
+};
+
+static struct pf_desc gss_spkm3_pfs[] = {
+	{RPC_AUTH_GSS_SPKM, 0, RPC_GSS_SVC_NONE, "spkm3"},
+	{RPC_AUTH_GSS_SPKMI, 0, RPC_GSS_SVC_INTEGRITY, "spkm3i"},
+};
+
+static struct gss_api_mech gss_spkm3_mech = {
+	.gm_name	= "spkm3",
+	.gm_owner	= THIS_MODULE,
+	.gm_ops		= &gss_spkm3_ops,
+	.gm_pf_num	= ARRAY_SIZE(gss_spkm3_pfs),
+	.gm_pfs		= gss_spkm3_pfs,
+};
+
+static int __init init_spkm3_module(void)
+{
+	int status;
+
+	status = gss_mech_register(&gss_spkm3_mech);
+	if (status)
+		printk("Failed to register spkm3 gss mechanism!\n");
+	return 0;
+}
+
+static void __exit cleanup_spkm3_module(void)
+{
+	gss_mech_unregister(&gss_spkm3_mech);
+}
+
+MODULE_LICENSE("GPL");
+module_init(init_spkm3_module);
+module_exit(cleanup_spkm3_module);